A2Billing is a telecom switch and billing system capable of providing and billing a range of telecom products and services to customers such as calling card products, residential and wholesale VoIP termination, DID resale, and callback services.

AbulEdu Calcul Mental is a software tool that trains children in mental calculation as stipulated by the French Ministry of Education for primary schools. Activities include addition, subtraction, multiplication of integers, addition tables (+2 to +9), times tables (x2 to x9), additional additives (to 10, to 100, to 1000), multiples (of 5, 10, 15, 20, 25 and 50), and orders of magnitude (with additions, subtractions, and multiplications). There is also an editor and selective launcher.

AeonWave-OpenAL is a thin OpenAL emulation layer that uses AeonWave to create one of the fastest rendering OpenAL implementations available. OpenAL is a cross-platform 3D audio API appropriate for use with gaming applications and many other types of audio applications. Its API style and conventions deliberately resemble those of OpenGL.

Algorithmic Autoregulation is a software system implementing a new self-regulating methodology for coordinating teamwork, based on collaboration and individual merit. It is well-suited for distributed teams, eliminating the need for central management.

Alore is an object-oriented programming language with a clean syntax that resembles Python and Lua. It is optionally-typed like Google Dart. It is both a dynamic scripting language and a general-purpose language
with static typing. It is aimed at most programming tasks, from short scripts to complex applications. It allows programmers to freely mix static and dynamic typing within a program. It has native threads and a very fast edit-test cycle. Programmers can always bypass type checking and run their programs immediately.

Antville is high performance, feature rich weblog hosting software based on Helma Object Publisher, an Open Source Web application server entirely written in Java. Antville itself is written in JavaScript and scales very well up to tens of thousands of weblogs on an ordinary machine. It is easy to use while offering a lot of advanced features which make it capable of hosting other types of websites as well. It features per-site language and timezone definitions, import and export of layout templates, import and export of stories (.xml), tags, polls, file uploads, user rights management, Blogger, MetaWeblog, and MovableType API support, virtual site hosting, feeds (full content or just stories, comments, per tag), and disk quotas. The AntClick package contains everything you need to run Antville on your own computer (Web server, application server, embedded database). It is already configured; just unpack the file, and you're done.